Friction spring draft-rigging for railway-cars.



PATENTED JAN. 21, 1908. W. H. MINER & J. F. OGONNOR.

FRICTION SPRING DRAFT RIGGING FOR RAILWAY CARS. APPLIOATION FILED APR.17,1907.

2 SHEETS-SHEET 1.

9G Ma 0 ()CDC) No. 877,466. PATENTED' JAN. 21. 1908. W. H. MINER & J. F. O'CONNOR. FRICTION SPRING DRAFT RIGGING 'POR RAILWAY CARS.

APPLICATION FILED APE.17,1907.

2 SHEETS-SHEET Z.

to friction draft rigging oi the kind in which ,Umrnn STATES PATENT OFFICE.

WILLIAM H. MINER AND JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNORS TO W. H. MINER. COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FRICTION SPRING DRAFT-RIGGING FOR RAILWAY-CARS.

To all whom it may concern:

Be 1t known that we, WILLIAM H. llrIINER and JOHN F. OCoNNoR, citizens of the Unlted States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Friction Spring Draft-Rigging for Railway-' gars, of which the following is a specifica- Our invention relates to friction draft ri gmg for railway cars, and more particularf a longitudinally movable friction shell is employed in connection with friction blocks within the shell having inclined 'or wedging meeting faces to force,'in connection with the spring and draw bar, the external friction faces of the friction blocks into sliding frictional e agement with the internal friction face of t e friction shell, and in'which' an anti-friction roller is employed between the friction blocks to prevent the friction devices from sticking and consequently acting irregularly and uncertainly in cushioning the draw bar strains or blows and in releasing. Heretofore in suchfrictiondraft rigging extremely heavy blowsand hammering action of the draw bar through the follower or followers against the friction shell, tends, in time, by

each successive blow, to gradually upsetor shorten the length of the friction shell, and thus ultimately so shorten the length of the friction shell that it will not prevent the springs from being compressed solid, thus removing their cushioning action on the friction blocks inside the friction shell and thereby causing extremely heavy blows of the draw bar against the friction blocks to burst the friction shell by lateral thrust of the friction blocks, and thus destroy the draft riggin or render inoperative, as the anti-friction ro or between the friction blocks communicates or transfers the longitudinal thrust of the draw bar against the friction blocks directly to the sidewalls .of the friction shell as soon shell permits t e springs to be compressed solid.

The object of our invention is to provide a practical and successful means of a strong, simple, efficient and durable construction for overcoming this objection or difficulty.

Our invention consists in the. means we employ for practically accomplishing this object or result; thatis to say it cdnsists, in con- Specification of Letters Patent. Application filell April l'li1907- Serial No. 368.623

=nally movable friction shell, friction locks Patented Jan. 21, 1908.

nection with the draw bar, draw bar strap or yoke, a direct acting sprin in line with the draw bar, front and rear fol owers, front and rear stops to engagethe followers, a lon itudiwithin the shell, an anti-friction roller between the friction blocks, and intermediate stops on the stationary frame of the car to limit the travel or reciprocating movement of the followers, and thus relieve the friction shell from the extremely violent and hammering blows of the draw bar, tending to shorten, upset orcompress the same.

Our invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown and described and more particularly specified in the claims.

In the accompanying drawing, forming a part of this specification, Figure 1 is a side elevation, artly in vertical longitudinal section of a. riction spr' draft rig ing embodying our invention ig. 2 is a p an view, partly in horizontal section; Fig. 3 is a ver tical cross section on line 3-3 of-Fig. 1; Fig. 4 is a detail side elevation, partly in vertical section, of one of the friction blocks; Fig. 5 is a detail pespective view of the rear follower; Fig. 6 is a detail plan view of the tie plate,

and Figs. 7 and 8 illustrate modifications of 85;

certain parts.

In the drawingA represents the center sills or portions of the car-frame to which the draft rigging is applied, B the draw bar, B its yoke, C c longitudinally arranged. direct acting draft rigging springs, D 1) front and. rear stops, securely anchored to the car frame for the followers to abut against, and D intermediate stops to limit the compression of the springs, and F and F .the front and rear followers which alternately engage the stops and coo erate with the draw bar and its yoke an the draft rigging springs.

G is a longitudinally -movable friction shell, preferabl cylindric in form, and hav- 100 friction shell G, and to which said frictionzlo5 shell is rigidly secured by one or more radnally extending pins or rivets 9, thus securely fixing the friction shell in the rear follower. The rear follower, moving in its guides, thus prevents the friction shell from turning. 11o

I H and H are longitudinally movable friction blocks having exterior friction faces h in ,roller K which is interposed between the inthe parts are once assembled.

clined or wedging meeting faces of the friction blocks, and has a rolling contact with theinclined or'wedging faces of both blocks, in order to prevent the friction blocks from sticking'and consequent irregular release and action of the friction devices; friction blocks, preferably the lower one H, is furnished with alongitudinal groove 7L3 at its front end, engaging a rojection g on the friction shell G, preferablyv the head of a rivet, inserted through said shell,'so that the annular shoulder h", of this groove will prevent the friction block H from being entircly removed from the friction shell after t The shoulder [t on the upper friction block H, in connectionlwith the anti-friction roller K, and the shoulder b on the lower friction block, also prevents the upper friction block H from being removed from the shell G after the parts are-assembled. By this construction and combination of parts in which the guide groove h? is open at the front end of the friction block H the-springs and friction blocks are all normally heldand confined in and by the friction shell, 'so'that they cannot drop out in the handling orin removing and replacing the draft rigging, after these parts have been once properly assembled together within the shell.

.ln assembling the friction blocks and s rings within the shell the roller K is first p aced between the friction blocks H II, and the friction blocks are inserted in the shell from therear end thereof and slipped to the front end of the shell until the rear end of the uide 'rooveh" en a es the uide or sto g g g za P 9 1 the springsi-l ciare then inserted, and then the rear follower F with its boss f projecting into the rear end of the shell (1 is applied under suitable pressure to slightly compress the springs and then fixed in place by inserting the pins or rivet gl- M .is the lower tie or guide plate which supports and guides the friction shell as well asthe draw bar extension or yoke B and the draft rigging as awholeQ. This tie or guide plate'is preferably furnished with a central longitudinal channel m to receive the lower xl-imb or member of the draw bar yoke, and

'60"witlrconcavely curved guide faces m to re- 3 ceive, fit and guidc'the friction shell G. The

upright walls or faces m m of the draw bar. yoke, channel; or guide m, are preferably inclined .or outwardly flaring from the middle portion thereof, as will be readily understood One of the.

parts to which this guide or tie plate is secured by its bolts, rivets or securing devices m The guide slot h and cooperating guide 9 on the friction shell prevents the friction bloclis from turning in the friction shell.

The intermediate stops 1) which limit the travel or reciprocating movement of the followers, when combined with the friction shell and friction blocks inside the shell, and the anti-friction roller between the inclined or wedging faces of the friction blocks, prevents the extremely heavy blows and hammering action of the draw bar from coming directly upon the friction shell, and thus tending to upset or shorten'the same, so that the springs can then be'compressed solid, and thus causing the two wedging frietion blocks inside the shell to burst it In the modification illustrated in Fig. 7

the front, rear and intermediate stops are shown as made in one piece. In the modification shown' in Fig. 8 the rear follower is shown as made integral with 1 and inclined meeting faces, an anti-friction V roller interposed between said v'cdging meeting faces and having a rolling action on both said blocks, said rear follower having a cenfriction shell, substantially as specified.

Ego In a friction draft rigging, the combi:

natidn with the draw bar, stops and spring and front and'rear followers, of a lOIlg'ltlldl nally movable cylindric friction shell having an inside friction face, a pair of cooperating friction blocks having cylindric friction faces tral boss fitting within the rear end of said and inclined meeting faces, an anti-fliOlLiOiliZ-i roller interposed between said wedging meet-: ing facesand having a rolling action on both," said blocks, said rear follower having a central boss fitting within the rear end of-said friction shell, and a pin extendin through said friction shell and the boss 0 said folhavingshouldere lower to secure said parts together, substantially as specified.

4. In a draft r1 ging, a tie orguide plate M wings orflanges furnished with seats to enga e thebottom flan es of the center sills an provided with a ongitudinal guide channel for the lower member of the draw bar yoke, and with curved uide 'faces for the friction shell, substantia y as specified.

5. In a friction draft rigging, the combination with. a friction shell, of a spring therein,friction blocks within the shell, one of said friction blocks being furnished with a longitudinal guide groove open at the front end thereof, a guide or stop secured to theffriotion shell and fitting in said guide groove to hold the friction blocks and springs within the shell in assembled position, and affollower secured to the rear end of said friction shell, substantially as specified.

e. In a'friction draft rigging, the'combination with a-friction shell, of a spring there in, friction blocks within the shell, one of said friction blocks being furnished with a longitudinal guide groove open at the front end thereof, a guide or stop secured to the friction shell and fittin in said guide groove to hold the friction b ocks, and spring within the shellin assembled position, and a fol-' lower secured to the rear end of said friction shell, said follower having a central boss fitging said shell, substantially as speci- 7. In a friction draft rigging, the combination with the draw bar, front and rear draft rig iitops andspring, of friction devices inclu g friction blocks having inclined faces and a friction member inclosing said blocks, and intermediate stops to limit the travel of the draw bar and prevent the spring from bein compressedsolid, substantially as specifie WILLIAM H. MINER. JOHN F. OCONNOR- Witnesses:

H. M. MUNDAY, PEARL AnnAMs. 

